One of the reasons I get immediately turned off as soon as I see a service (VPNs, etc.) being offered with a "one-time lifetime subscription cost." Nope. Not going to happen. Either they'll change the terms down the line, shut down, or be acquired by someone else who'll change the terms.

With a monthly or yearly subscription, at least you can calculate how much you're spending per unit of time. For a 'lifetime' you have no idea how long that single purchase will be spread across.